Altcoin bounties are more profitable than bitcoin paying bounties, you can avoid scam altcoin bounties with good research, you can follow reputable bounty managers as well, the choice is yours, we have bubbalex, Hhampuz, btcltcdigger etc follow popular bounty managers and you will have less disapointing results
I can't be sure a manager with a good reputation will give profit many managers with good reputations that happen are scams or altcoins have no prices and are just displayed in wallets so it can't be the first choice keep reading the whitepaper, see the roadmap, partners and team when everything looks good the large potential of the project and the bounty will bring profit